Calculating machine



Feb. 9, 1943. c. M.- F. FRiDEN 1 CALCULATING MACHINE Filed. June 19,1935 5 Sheets-Sheet l FIB E FIEJEL ATTORNEY Feb. 9, 1943. c, FRlDEN2,310,280

CALCULATING MACHINE Filed June 19, 1935 5 Shets-Sheet 2 FIG 4 145 1/ 1/2J//J/6 !7 TTORNEY Feb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINEFiled June 19, 1935 5 Sheeis-Sheet 3 INVENTOR Car/ M f fr/oe/ ATTORNEYFeb. 9, 1943. c. M. F. FRIDEN CALCULATING MACHINE Filed June 19, 1935 5Sheets-Sheet 4 I iWENTOR (a/v A4. f." Fr/a en ATTORNEY Feb. 9, 1943. cFRlDEN 2,310,280

CALCULATING MACHINE Filed June 19, 1935 5 Sheets-Sheet 5 h All!INVENTOR. Car/ M. f Fr/oer;

A TTORNEY Patented Feb. 9, 1943 CALCULATING MACHINE Carl M. F. Friden,Oakland, Calif., assignor to Friden Calculating Machine 00., Inc., acorporation of California Application June 19-, 1935, Serial No. 27,338

18 Claims.

My invention relates to calculating machines for performing addition,subtraction, multiplication, and division, and more particularly tomachines of the type having an ordinally shiftable accumulator orregister carriage.

It is an object of the invention to provide a calculating machine havingan improved register carriage shifting mechanism.

Another object of the invention is to provide an improved calculatingmachine having a register carriage which can be shifted easily andquickly by power driven means without the possibility of accidentalinterference with other parts of the machine.

Another object of the invention is to provide an improved calculatingmachine in which the carriage shifting mechanism is driven from theactuating mechanism which serves to introduce values into the machine.

Another object of the invention is to provide an improved calculatingmachine in which an incorrect registration cannot occur during shiftingof the carriage.

Another object of the invention is to provide an improved calculatingmachine in which an incorrect registration cannot occur when the valueentering actuating mechanism is operated while another machine operationsuch as carriage shifting is being carried out.

Another object of the invention is to provide an improved calculatingmachine of the type having a unidirectionally rotatable actuator andbidirectionally rotatable numeral wheels which attains the foregoingobjects.

' Another object of the invention is to provide an improved calculatingmachine of the type having a unidirectionally rotatable actuator andbidirectionally rotatable numeral wheels in which the shiftable carriagecan be moved from one ordinal position thereof to any selected ordinalposition by manipulation of control keys.

Other objects will appear from the following description and thedrawings. In the drawings Figure 1 is a full-size vertical longitudinalsection of the rear part of the machine taken in a plane immediately tothe right of the mechanism of lowest order and illustrating the relationof the accumulator and revolutions counter to the actuating andselecting means therefor, certain gears being shown schematically. Theplane of the section is indicated by the line l-! in Fig. 4.

Figure 2 is an enlarged detail elevational view of a portion of Figure 1as indicated by the line 2-2 in Figure 1. The figure is partially brokenaway to illustrate the construction more clearly.

Figure 3 is an enlarged detail elevational view of a portion of Figure 1as indicated by the line 3-3 in Figure l, a part of the figure beingshown in section to illustrate the construction more clearly.

Figure 4 is a fragmentary plan view of the portion of the machineillustrated in Figure 1 with the carriage and keyboard'mechanismremoved.

Figure 5 18 a rear elevational view of the carriage and the carriageshifting mechanism as indicated by the line 55 in Figure 1.

Figure 6 is an elevational view of the operation controls of the machineas viewed from the left of the control plate on which such controls aremounted.

Figure '7 is a view illustrating a part of the carriage shift controlsas viewed in elevation from the right, and showing another part insection as indicated by the line 'll in Figure 4.

Figure 8 is a fragmentary elevational view of a portion of the carriageshift controls as viewed from the left.

Figure 9 is a vertical longitudinal section of the rear part of themachine, similar to Fig. 1 but is taken through the axis of one of theactuating shafts with certain parts shown in elevation and with otherparts omitted to obtain clar- 'ity.

Figure 10 is a fragmentary plan view of one of the actuating shafts andthe mechanism associated therewith. The view is generally similar to Fi4.

Figure 11 is a transverse sectional elevation of mechanism shown in Fig.10 as indicated by the line |l-H in Fig. 10.

Figure 12 is a fragmentary perspective view of the actuating means forthe revolutions counter.

Figure 13 is a fragmentary transverse section- 9.1 elevation of oneorder of the revolutions counter actuating means.

I have shown my invention as embodied in the type of calculating machinehaving a unidirectionally. operable actuator and reversible orbidirectionally operable numeral wheels, as disclosed for example, in myco-pending application, Serial No. 724,482, filed May 8, 1934, to whichreference is made for a complete disclosure of features of this typemachine which are not disclosed herein. While certain features of myinvention are adapted particularly for use in this type of machine, itis to be understood that certain of such features and other features ofmy invention can be applied to other types of calculating machines.

The machine disclosed herein includes base I 0 Side members l2, l3 areconnected by cross frame members l6, |8 (Figs. 1 and 4) and |9 (Fig. 1)which serve to mount various mechanisms described more particularlyhereinafter. The accumulator register comprises a series of reversiblenumeral wheels 2| in register carriage 22 which is mounted for endwiseshifting movement laterally of themachine ineither direction tovariousordinal positions thereof on rollers 26 journalled on cross framemembers |6, |9. The values to be introduced into the machine aredetermined by a plurality of orders of settable value keys 23 and powerdriven actuatingmeans controlled by plus key 260 and minus key 2M. Thenumber of actuations of accumulator numeral wheels 2| are registered incounter numeral wheels 24. The above identified mechanisms will now bedescribed in greater detail.

The registration of values is elfected cyclically by operation of theactuating means from electric motor 25 (Fig. 1) through a cyclic clutch26 (Figs. 4 and 6). Motor 25 has driving pinion 21 which is connected byidler gear 28 with drive gear29 of clutch 26.

The clutch determines cyclic operation of the machine and is constructedto provide for ready control thereof during high speed operation.

Driving clutch gear 29 (Figs. 4 and 6) is mounted for rotation on drivenshaft 3| (Fig. 6) and has driving element or ratchet 32 secured thereto.The driven element of the clutch includes disc 36 secured on transverseshaft 3| (Fig. 4) which is suitably journaled in side members |2, |3.Gear 29 and ratchet 32 are held in proper position on shaft 3| betweendisc 36 and gear hub 31 pinned on shaft 3 I. The connection betweendriven element 36 and ratchet 32 is provided by clutch pawl 38 (Figs. 4and 6) pivoted on pin 39 between disc 36 and cam ring 48 securedthereto. To limit pivotal movement of pawl 38 (Fig. 6), slot 4| isformed therein to engage pin 42 secured between disc 36 and ring 48.Intermediate its ends, pawl 38 has nose or tooth 43 which is positionedfor engagement with the teeth of ratchet 32 as controlled by the pivotalposition of the pawl which is normally urged to clutch engaging positionby spring 44, tensioned between the movable end of pawl 38 and disc 36.In the disengaged or full cycle position shown in Fig. 6, stop extension46 of pawl 38 is engaged by pivotally mounted clutch control lever 41 tomaintain nose 43 out of the path of the teeth of ratchet 32. To engagethe clutch, lever 41 is oscillated out of engagement with the stop 46 sothat spring 44 becomes effective to engage nose 43 with ratchet 32, andthe clutch is engaged for one or more cycles of rotation depending uponthe re-engagement of lever 41 with stop 46. Thus, disc 36 and transverseshaft 3| are operable cyclically and in one direction as controlled bylever 41. During rotation of the clutch, lever 41 is maintainedin'clutch engaging position by roller 48, mounted thereon in operativerelation with cam ring 48. Ring 46 is provided with a peripheraldepression into which roller 48 falls when the clutch is in full cycleposition. The actuating means and the clutch are maintained in fullcycle position by the engagement of lever 41 with stop extension 46 ofpawl 38, and by spring urged pawl 49 (Fig. 1) which engages seat 56 incam disc I26.

From transverse shaft 3| a plurality of longitudinally extendingactuating shafts are driven in a one to one gear ratio to provide adrive for the actuating elements of the machine. Shaft 3| (Fig. 4) hassuitable bevel gear connections 5| with longitudinal shafts 52 (Figs. 1,4, 9 and 10) which are suitably journalled in cross members l1, l8. Eachshaft 52 (Figs. 9-11) carries a pair of actuating elements 53, 53A,which are associated with the two adjacent orders of the machine. Eachelement '53 is identical and comprises a cylinder having respective setsof stepped teeth 56, 51 for cooperation with the selecting mechamsm.

The values set into the machine are determined by the relativepositioning of ten-tooth gears 58, 59 (Figs. 1 and 9-11) slidablymounted on two part square register driving shaft 6|, which isjournalled in cross members I6, I! and I8 and can be disconnected atmember Gears 58, 59 have associated therewith respective slides 62 whichextend rearwardly to cooperate with a bank of keys 23. Slides 62 aremounted for endwise movement on a plurality of similar pivoted links 63(only one of which is shown) which are spring pressed as by spring 64 tourge slides 62 to their forward position where gears 58, 59 do notregister with stepped teeth 56, 51. By depression of a key-23 one ofgears 58, 59 is placed in alignment with the associated stepped teeth,56 for example, so that shaft 6| is driven a num-- ber of increments ofmovement corresponding to the depressed key upon rotation of theassociated actuating cylinder 53. Gears 58, 59 are maintained in properrelation to teeth 56, 51 by springpressed ball 66 and ten-tooth gear 61on shaft 6|. The structure of the actuating and selecting mechanisms isdisclosed more fully in my copending application referred to above.

From the foregoing description it is seen that upon rotation ofactuating cylinders 53 a value as determined by the depressed keys 23 isregistered on numeral wheels 2| in terms of increments of rotation ofassociated shafts 6|. Because of the axial off-setting of cylinders 53,53A only one actuating shaft 52 is required for each two orders of themachine, the two associated register driving shafts 6| being spacedslightly to the right and left respectively of shaft 52.

To transfer the increments of movement of shaft 6| to correspondingnumeral wheel 22, spool 7| is slidably mounted on shaft 6| betweenplates I6, I! and has respective ten-tooth plusminus gears I2, 13. Gears12, 13 are adapted to mesh with ten-tooth gear 14 on numeral wheel shaft16 suitablyvjournalled in upright position in carriage frame 17. 1|either to the right or left as viewed in Figs. 1 and 9, either gear 12or 13 can be meshed with gear 14 to cause rotation thereof selectivelyineither direction. To prevent overthrow of numeral wheels 2|, eachshaft I6 has tentooth gear 18 engaged by spring-pressed ball 19.

The shifted position. of all spools 1| (Figs. 1, 4, 9 and 10) in themachine is controlled simultaneously by virtue of the positioning ofspools 1| in parallel relation on strap or bail 8|,- which fits closelybetween gears l2, l3. Strap 8| is mounted for pivotal movement by arms82 on shaft 83. Thus, by rocking shaft 83 and oscil-' By shifting spoolI spect to strap 8| and to accurately determine the neutral positionthereof and of gears I2, 13, the upper ends of arms 86, 86 (Figs. 1 and2) engage eccentrically mounted stop 92 having of! center portion 93positioned in side member I2. Stop 92 is held in adjusted position by:nut 94 threaded thereon and compressing a suitable spring washer.Because of eccentric movement of stop 92, the position of centralizerarms 86, 81, and consequently of plus-minus gears I2, I3, can be easilyand accurately adjusted.

Tens transfer mechanism for accumulator numeral wheels 2I is associatedwith plus-minus gears I2, I3, which may be conventional construction andas shown is generally of the form described in said co-pendingapplication. Generally, such mechanism includes transfer gear 96 (Figs.1 and 9) shiftably mounted on shaft H and movable by the numeral wheelof next lower order into the path of single tooth actuator 91 (Figs. 1,4 and 9). Actuators '91, 91A (Fig.

4) for adjacent transfer gears 96 are offset.

axially on associated shaft 52. Numeral wheels 2I are zeroized asdescribed in said application by manipulation of handle 98 (Fig. 1).

Revolutions counter mechanism The revolutions counter or countingregister including numeral wheels 24 (Fig. 1) is mounted in carriage 22and has associated therewith an actuator mounted in the frame of themachine and which is constantly connected with the accumulator actuatingmeans for registering both positive and negative increments on numeralwheels 24. Each numeral wheel 24 is secured on shaft IOI which has oneend removably journalled in carriage frame 71 and the other end in crossbar I02 removably connected with frame II by suitable end plates (notshown). Spring I03 seated in bar I02 urges shaft IOI against carriageframe II to maintain proper positioning of numeral wheel 24 andassociated parts. Shafts IOI are spaced ordinally to correspond to thespacing of accumulator numeral wheels 2|.

In order to actuate or introduce values into the revolutions counterthere is provided an actuator including a member I06 (Figs. 1 and 4)which has a compound motion having two major components, one atranslatory reciprocation and the other a rotary oscillation. That is,the members or shaft I06 is mounted in side frame members I2, I3 to movefrom end to end and to be rocked back and forth about its axis. Mountedon shaft I06 (Fig. 4) is a pair of collars I01 each of which is extendedto support a pair of parallel rods I08 and I09. Mounted freely on shaftI06 between rods I08, I09 is a plurality of actuator spools IIO (Figs.1, 4, 12 and 13) which in general are identical and provide for ordinalspacing of the actuator elements thereon. Spool III of lowest order atthe right end of shaft I06 is only partially complete and carriesactuator element or finger II2 (Figs. 1 and 4) which projects radiallybetween ten-tooth gear II3 (Fig. 1) and single-notch disc II4 secured inspaced relation on shaft IOI.

Finger II2 (Fig. 1) is connected by spring II6 to rod I08 so that it isurged in a clockwise direction, as seen in Fig. .1, about the shaft I06.Such movement of finger H2, however, is restrained by projection II! ofspool III which engages beneath rod I09. By this means, spool III andfinger II2 move positively withishaft I06and rods I08, I09 duringcounter-clockwise movement thereof and move yieldingly there with duringclockwise movement. As seen in Fig. 1, clockwise movement of shaft I06and rods I08, I09, under the urgency of spring II6 moves finger II2between successive teeth of gear II 3, which are maintained in properalignment by an overthrow preventer including tentooth gear H8 andspring-pressed ball II9. When finger H2 is positioned between adjacentteeth of gear II3, the rotary oscillation of shaft I06 is interruptedand the shaft is translated axially toward the left, as seen in Fig. 4,for instance. Such movement, since finger II2 remains intermediatesuccessive teeth on the tentooth gear I I3, is effective to rotate theshaft IOI for one tenth of a complete revolution, and thus to advancethe associated numeral wheel 24 positively for one successive digit.

At the conclusion of such axial movement toward the left, shaft I06again oscillates, but in counter-clockwise direction, so that finger II2 is rotated positively, due to the contact of rod I09 againstprojection I ll, into the position seen in Fig. 1 in which finger I I2is out of mesh with gear H3. The return axial movement of shaft I06toward the right, as seen in Fig. 4, therefore, restores the parts totheir original position. By the described operation, the numeral wheel24 in ordinal alignment with finger H2 is advanced one unit.

It is especially pointed out that if, when shaft I06 initially rotatesto mesh finger I I2 with tentooth gear II3, such meshing movement isfollowed by an axial translation of the shaft I06 toward the left (Fig.4), the numeral wheel is advanced in a positive direction. On the otherhand, if, following the initial meshing movement of finger II2 with thegear II3, the axial translation of shaft I06 is toward the right, thenthe direction of movement of shaft I!" and numeral wheel 24 issubtractive or negative.

Spool III and its associated actuator finger H2 re ister on the alignednumeral wheel 24 the number of actuations occurring in that ordinalposition of the carriage; The other spools IIO form part of the tenstransfer mechanism which will now be described. Spool IIO (Figs. 4, 12and 13) adjacent spool III of lowest order isprovided at its left-handend with actuator finger I2I, similar to finger I I 2 of spool I I I,and is also provided at its right-hand end with finger I22 (Figs. 1, 4and 13) which is bent to be co-planar with finger H2 and has projectionI23 engaging finger II2. Thus, spring H6 of the tens order, forinstance, as seenin Fig. 4, is effective to urge finger I22, andparticularly its projection I23, into contact with the finger II2 of theunits order. However, spool III of the units order cannot yield becauseits projection I I I is in contact with rod I09. However, when rod I09is oscillated about the axis of shaft I 06, finger I22, under theurgency of its spring I I6, is free to follow finger II2, providing thenotch in disc II4 (Fig. 13) is in position therefor. Spools H0 of higherorder are similarly formed, finger I22 of each spool IIO overlapping andengaging finger I2! of spool I I0 of next lower order.

In order to effect the tens transfer, .discs II4 not pass by the barrierof disc II4, thenthe tens order spool I I cannot rotate about the axisof the'shaft I06 and, correspondingly, due to the interlockingrelationship of fingers I2 I, I22 of the remainder of the spools 0 forthe higher -orders, maintains all such higher order spools stationary.But on the other hand, if the tenscarry notch in the units order disc H4is in its 9 position during addition to permit passage of the fingerI22, then such finger rotates along with the finger H2 and causes acorresponding rotation of the tens order spool I I0, and finger I2Ithereof is effective upon its initial axial movement thereof on gear II3of the tens order in the revolutions counter to rotate shaft IOI andnumeral wheel 24 through one-tenthof a rotation and thereby effect thetens-carrying operation. Correspondingly,- if the units numeral wheelstands at 0 in a subtractive operation, the rocking movement of fingerI2I, I22 is delayed until the initial axial movement thereof alignsfinger I22 with the notch of the associated disc, so that finger I2Iengages gear II3 of the. -ens order to effect a negative transfer duringthe return axial movement of the actuator. A similar action occurs inall higher orders to effect a tens-carrying operation.

The rotary oscillation of the shaft I06 is produced in synchronism withthe rotation of the transverse shaft 3|. At the end of the shaft 3|(Fig. 4) which projects through side frame member I2, there is mounted acam disc I26 having cam groove I21 formed therein. Cam follower I28(Fig. 1) projecting from one arm I29 (Figs. 1 and 4) of a bell crankgenerally designated I3I and pivoted as at I32 on side member I2 engagesgroove I21.' Bell crank I3I is likewise provided with arm I33 which isforked to engage pin I34 on crank arm I36 secured on the shaft 106inside of frame member I2. Pin I34 projects through a suitable aperturein plate I2 and is of sufficient length to maintain the operativerelation of bellcrank I'3I and arm I36. The contour of cam groove I21 issuch that bell crank I3I is oscillated during each cycle of rotation ofactuating shaft gaged with its corresponding groove I42, I43 in drumI4I. Sleeve I5I is shown in Fig. 1 in its central position when pin I51is engaged slightly with groove I42 and pin I59 is just out ofengagement with groove I43.

To'place sleeve I5I in either desired extreme position, I provide onsleeve I5I, annular groove I66, which is engaged by shifting pin I61projecting through side member I3 from lever I68 (Fig. 6) on shaft I69.Thus, oscillation of shaft I69 serves to shift sleeve I5I along shaftI52. In

3I, and, through crank arm I36 causes a comparable oscillation of shaftI06.

The longitudinal or axial translation of the shaft I06 is .provided by amechanism illustrated in Figs. 1 and 4, by means of which the phaserelationship of the oscillation and reciprocation of shaft I06 can bevaried. Cam drum I4I (Fig. 4) is mounted on shaft 3I adjacent sidemember I3 and has a pair of grooves I42 and I43 cut therein. Cam groovesI42, I43 are of identical contour but are polarly or angularly spacedfrom each other, and means are provided for optionally engaging eitherof the grooves I42 and I43. To

this end, I. provide sleeve I5I (Fig. 1) mounted freely on verticalshaft I52 secured in a pair of spaced brackets I53 on side member I3.The lower end of sleeve I5I is united to lever arm I56 which carriesfollower pin I51 at its end in operative relation with groove I42 indrum I4I. On the upper end of sleeve I5I is lever I58 at one extremityof which follower pin I59 is prothis fashion, either pin I51 isintroduced into groove E42 so that the shaft I06 reciprocates in phaserelationship with the characteristics of the groove I42, or, conversely,pin I59 is engaged in groove I43 so that shaft I06 in such circumstancespartakes of the reciprocatory movement imparted by cam groove I43.

Thus, as transverse shaft 3I rotates, it imparts to the shaft I06 anaxial translation in either selected one of two different phaserelationships with shaft 3I. The phase relationship which is selected ina particular instance controls the direction of rotation of the numeralwheels 24 in the revolutions counter as described above.

Means are provided for manually setting the revolutions counter actuatorto reverse the direction of actuation thereof irrespective of the typeof actuation determined for the accumulator numeral wheels. Shaft I69(Fig. 6) carries axially oifset oppositely extending arms I1I, I12 havepins I13, I14 on the facing sides thereof adapted for selectiveoperative relation withopposite vertically spaced notches formed indiamond-shaped frame I16 secured on slide 234 in spaced relationtherefrom. Arm HI and pin I13 lie on one side of frame I16 and arm I12and pin I14 on the opposite side thereof, so that axial shifting ofshaft I69 is effective to determine which of pins I13, I14 is to beoperatively engaged with frame I16 and slide 234. As describedhereinafter, slide 234 is moved in one direction upon depression of pluskey 200 and in the other direction upon depression of minus key 20I.Therefore, if pin I13 be engaged with the corresponding shaft I69,through arm I68, pin I61, and sleeve I5I (Fig. 1) controls the direction'of actuation of revolutions counter numeral wheels 24. It will also beseen that by shifting shaft I69 (Fig. 6) to disengage pin I 13 andengage pin I14 with frame I16, the direction of oscillation of shaft I69for a given direction of movement of slide 234 is reversed and hence thedirection of actuation of numeral wheels 24 is also reversed. Such axialmovement of shaft I69 is controlled by control lever I8I pivoted onplate 202 and having arcuate cam sector I82 engaging enlarged end I83 ofshaft I69 and operating in a manner fully disclosed in said co-pendingapplication. Lever I8I is latched resiliently in either position thereofby spring-urged pawl I84. Spring-urged pawl I86 engages a notch in endI83 to maintain alignment of pins I13, I14 with the respective notchesin frame I16. Thus, the revolutions counter can be set to give truefigure results or complements thereof.

Plus and minus keys Manually operable means in the form of plus andminus keys are provided for controlling selective positive and 'negativeregistration on the numeral wheels. Keys 200, 20I (Fig. 6) are similarand are mounted for endwise movement thereof on control plate 202 bysuitable slots engaging pins 203; Suitable springs (not shown) connectedto ears 204 on the key stems urge keys 200, 20! to their upper inactiveposition. Both keys 200, 20!, upon depression thereon serve to engagethe clutch and energize the motor to cause one or more cycles ofmovement of the moved to the left, as viewed in Fig. 6 by a pin 206acting against a cam surfacef201. Adjacent its left or rear end, slide208 has vertical slot 2!! which is engaged by pin 2!2 on the short upperarm of clutch control lever 41. Therefore, the movement of slide 208caused by depression of a key 200, 20! is effective to oscillate lever41 to engage the clutch.

To energize the motor by movement of keys 200, 20!, slide 208 is slottedto receive pin 2l4 at the upper end of lever 2|5 which is suitablypivoted intermediate its ends at 2 I 6 on side frame member !3 (Figs. 6and '7). At its lower end, lever 2l5 has a suitable pin and slotconnection with the upper end of lever 2 !1 also pivoted intermediateits ends on side member !3. At the lower end of lever 2I1, pin 2l8 ofsuitable insulating material is provided in overlapping relation withspring contact 2!9 (Fig. '1) which, with contact 220, forms part of themotor circuit. Through the described linkage, the movement of slide 208caused by depression of a key 200, 20! is effective to engage contacts 2I9, 220 and energize the motor. The described linkage is also effectiveupon release of the depressed key to return slide 208 to the inactiveposition shown in Fig. 6 by action of the displaced spring contact 2 !9,so that machine will stop at the end of the cycle of actuation then inprogress because of the return of clutch control lever 41 to clutchdisengaging position.

From the foregoing it is seen that depression lation of shaft 83(Fig. 1) serves to engage gears 13, or gears 12 with numeral wheel gears14.

' When gears 12 and 14 are meshed, positive regisof either key 200, 20!is effective bymovement of slide 208 to engage the clutch and energizethe motor. The movement of slide 208 also provides an interlock betweenkeys 200,20! as depression of one of such keys moves a lock portion 22!(Fig. 6) of slide 208 into blocking relation with the flat bottomsurface of pin 206 of the undepressed the direction of registration onthe numeral faces 232, 233 on plus-minus slide 234. Slide 234 issupported for endwise movement by link 236 having respective pivotalconnections with plate 202 and with one end of. slide 234, and by arm231 pivotally and adjustably connected to the other end of slide 234 andmounted on shaft 83. Thus, selective depression of keys 200, 20! servesto move slide 234 forwardly or rearwardly of the machine and tooscillate arm 231 and shaft 83 in opposite directions. As describedabove, osciltration is determined, and when gears 13 and 14 are meshed,negative registration is determined. Therefore, keys 200, 20! (Figs. 6)by selecting either set of gears 12 or 13 for meshing with gears 14determine the sign character of the registration on thenumeral wheels.

Latch means are provided in cooperative relation with the plus and minuskeys to positively maintain the control exerted by such keys until adepressed key is released. Latch arm 24! (Fig. 6) is pivoted at 242 onplate 202 and has its free end held against the upper side of plus keyroller 23! by spring 243 connected between arm 24! and plate 202. Nose244 of arm 24! is adapted for latching engagement with notch 246 at thetop of cam surface 232 upon depression of plus key 200 and theconsequent rearward movement of slide 234. Latch arm 24!, therefore,insures proper meshing of gears 12, 14 while plus key 200 is depressed.Upon release of plus key 200, roller 23! thereof strikes arm 24! andmoves it to inactive position permitting return of slide 234 and gears12 to inactive position. Because of the overlapping relation of slide208 with pin 206 on key 200 and the fact that slide 208 is held indrive-establishing position until near the end of the cycle by clutchcontrol lever 41 and roller 48 thereon, latch arm 24! is not engaged andreleased by roller 23! until after all increments of movement have beenentered in the numeral wheels. Latch arm 245 pivoted at 241 on plate 202and having nose 248 cooperable with notch 249 in slide 234 operates inconnection with minus key 20! in the manner described above with respectto latch arm 24! and plus key 200. Thus, slide' 234 and plus-minus gears12, 13 are maintained positively in mesh throughout operation controlledby plus and minus keys 200, 20 I.

Division mechanism The calculating machine is also preferably providedwith automatic division mechanism for performing a plural order divisionoperationas disclosed in my said co-pending application. Only a part ofsuch mechanism is disclosed herein for illustrative purposes. Manuallyoperable division control means is provided in the form of lever 26!(Fig. 6) pivoted at 262 on control plate 202. Movement of lever 26! fromits illustrated position forwardly of the machine, in the direction ofthe arrow, serves to condition the machine for the division operationand return thereof serves to initiate such operation. The lower end ofcontrol lever 26! isv positioned for engagement with roller 263' onslide 264 which is mounted for endwise movement by a plurality ofsuitable slots engaging pins 266 on plate 202. Spring 261 urges slide264 to the right to hold roller 263 against lever 26!. At its rear end,slide 264 has roller 268 abutting downwardly extending arm 269 of bellcrank lever 21!, which is pivotally supported on pin 212 at the upperend of division operation control arm 213. Arm 213 has its lower endpivoted at 214 on plate 202. Notch 216 is provided at the end of arm 269-for cooperation with pin 211 adjustably mounted on plusminus slide 234'to connect slide 234 and division control arm 213. When division lever26! is moved forwardly, slide 264 moves rearwardly, and through roller268' rocks bell crank lever 21! to engage notch 216 with pin 211. Thus,the auto plate 282 and having spring 281 associated therewith. Verticalarm 288 of lever 284 is operatively engaged with pin 289 adjustablymounted on clutch actuating slide 288 to provide for accuratepositioning thereof with respect to arm 288. It is seen, therefore, thatclockwise (Figure fi) movement of lever 261 through slide 264, bellcrank lever 211, link 282, and bell crank lever 284 serves to moveclutch actuating slide 288 rearwardly and'thereby engage the clutch aspreviously described. It will be recalled that such movement of slide288 through levers 215,

211 moves contact 219 (Fig. '1) toward contact 228 into circuit closingposition. However, in division the circuit is not closed by suchmovement as contact 228 has been moved out of its normal circuit closingposition by pin 291 (Figs. 6 and '1) formed of suitable insulatingmaterial and mounted on slide 264. Upon release of division lever 261,slide 264 moves forwardly to the position shown in Fig. 6 and contact228 moves into engagement with contact'219 to close the motor circuitand start the divisionoperation.

Shifting mechanism Means are provided for shifting the carriage ineither direction from one ordinal position to another by power drivenmeans controlled by manually operable keys. Preferably, the power drivenmeans comprises the actuating means for entering values into theaccumulator register. Carriage 22 (Fig. 5) has plate 381 mounted alongthe rear side thereof by means of adjusting screws 382 threaded inbrackets 383 on the,

carriage and having smooth ends pivotally engaged with projecting endportions 384 of plate 381. Plate 381 is secured against pivotal movementon screws 382 by clamping screw 386. Plate 381 has vertical slots 381formed in the lower edge thereof by teeth 388, slots 381 being spacedapart a distance equal to the ordinal spacing of the machine and alignedwith drive Slots 381 are adapted for engageshafts 61. ment by oppositeshift pins 311 on shift gear 312. Gear 312 is journalle'd on cross framemember 16 and. is rotated by means described later to shift the carriageby virtue of the engagement of pins 311 in slots 381; such engagement Ialso serves to lock the carriage in position. One

half revolution of gear 312 effects one ordinal spacing of carriage 22and to provide for accurate centering of the carriage at the end of ashift, centralizing cam 3l6 (Figs. 1, 4 and 5), is mounted for rotationwith gear 312. Centralizing arms 311 (Figs. 4 and 5) pivoted at 318 onframe member 16 have respective rollers 319 engaging opposite sides ofcam 316 under the influenceof spring 328 tensioned between arms 311.When pins 311 are in horizontal alignment the carriage is properlypositioned and rollers 319 (Fig. 5) are seated in opposite depressio'nsformed between the high portions of cam 316. Accurate initialpositioning of carriage 22 with respect to pins 311 is provided byadjusting screws 382 which are adjusted with the parts positioned asdescribed.

Yieldable means are provided to prevent shifting of the registercarriage beyond the lowest and highest ordinal positions thereof. Endslots 381A are formed in part by plate 381 and in part by respectivesimilar pawls 326. Each pawl 326 is pivoted at 321 on plate 381 andextends inwardly to position straight edge 328 thereof opposite an endtooth 388 to form an end slot 381A. Pawls 326 are held resiliently inthe position shown against respective stop pins 331 by spring 332tensioned between pawls 326. When carriage 22 is in an end position, onepin 311 lies in an end slot 381A and the other is po-' sitioned beneathadjacent pawl 326 opposite inclined edge 333 thereof. In this conditionrotation of gear 312 in a direction to move the carriage beyond the endposition merely results in lifting of pawl 326 by action of pins 311 oninclined edge 333. However, upon rotation of gear 312 in a direction toeffect carriage shifting to an intermediate ordinal position, verticaledge 328 of pawl 326 positively resists the pin 311 in slot 381A andcarriage shifting results. It is seen, therefore, that the carriagecannot be shifted beyond either end position thereof by operation ofshift gear 312.

As stated above, shift gear 312 is rotatable in either direction byselectively operable drive connections with the' actuating means of themachine. For this purpose, the two lowest order actuating shafts 52(Fig. 4) are extended rearwardly and have respective collars 341 securedadjacent the ends thereof. Each collar 341 is provided with diagonallyopposite slots slidably engaged by corresponding teeth 342 of ashiftable drive establishing collar 343 mounted freely on the end ofshaft 52. Opposite teeth v342 thereof, each collar 343 has smaller teeth344 adapted for engagement with corresponding slots in respective gearsleeves 346, 341. which are journalled in cross frame member 16 andsmall plate 348 mounted on member 16 by spacers 349 and suitablefastening screws. Gear sleeve 341 (Figs. 4 and 5) has gear 351 meshing.with idler gear 352 (Fig. 5) journalled in frame member 16 and plate 348and also meshing with shift gear 312. Gear sleeve 346 (Figs. 4 and 5)has gear 353 (Figs. 1 and 5) offset axially from idler gear 352 andmeshing with wide reverse idler gear 354 suitably joumalled in framemember 16 and plate 348 and also meshing with idler gear 352. Thus,rotation of gear sleeve 346 in a clockwise direction as viewed in Fig. 5causes counter-clockwise rotation of shift gear 312 and shifting ofcarriage 22 to the right as viewed from the front of-the machine.Correspondingly, rotation of gear sleeve 341 in a clockwise direction asviewed in Fig. 5 effects clockwise rotation of shift gear 312 andshifting of carriage 22 to the left as viewed from the front of themachine. Thus, by selective establishing of drive connections betweengear sleeves 346, 341 (Fig. 4) and collars 341 upon selective shiftingof respective shiftable collars 343 carriage 22 can be shifted in eitherdirection. The gear ratios are so chosen that one rotation of actuatingshafts 52 eifects one-half rotation of shift gear 312.

Manually operable control means-are provided for the carriage shiftingmechanism described above to enable selective shifting of the carriagein either direction through one or more ordinal spaces. Shift keys 31!,312 (Figs. 7 and 8) are depressible to initiate shifting of the carriageto the right and left respectively as viewed from the front of themachine, and as indicated by the arrows. Depression of either key servesto enable a drive connection from the actuating means to the carriageshifting mechanism during the first part of its downward movement andthereafter to engage the clutch and energize the motor. Keys 31!, 312(Fig. 7) are mounted for endwise movement by suitable longitudinal slotsformed therein and engaged by a plurality of studs 313 secured on sideframe member !3. Keys 31!, 312 have adjacent ears 316 with respectivestuds 311, 318 mounted therein and extending to either side thereof. Tomaintain the shift keys resiliently in raised position, coil spring 38!(Fig. 8) is provided having its ends fastened to side member !3 andpassing over upper studs 313 and under the ends of studs 311, 318 whichextend through suitable slots in side member !3. To enable the driveconnection from the actuating means to the carriage shifting mechanism,stud 311 engages the upper end of arm 382 secured on sleeve 383 (Fig.4). Sleeve 383 is journalled on transverse shaft 386 which is suitablyjournalled at its ends in side member !3 and bracket 381 (Figs. 4 and 7)on cross member !8. At its left end, sleeve 383 (Fig. 4) is providedwith depending arm 388' (Figs. 7 and 8) having its rounded end inengagement with the front end of rearwardly extending rod 39! (Figs. 4,'1 and 8). Rod 39! is mounted for sliding movement in cross framemembers !1, l8 and is resiliently urged to itsforward position by spring392 compressed between cross member !8 and a suitable washer on rod 39!,At its rear end, rod 39! (Figs. 4 and 7) has shift fork 393 securedthereon with its forkedend in engagement with an annular groove inright-hand shiftable collar 343. From the foregoing description, it isseen that depression of key 31! is effective through stud 311 to rockarm 382, sleeve 383 and arm 388 to move rod 39! rearwardly. Suchrearward movement of rod 39! is effective through shift fork 393 toengage teeth 344 of right-hand shift collar 343 with corresponding slotsin gear sleeve 346. Thus, initial depression of shift key 31! iseffected to enable a drive connection from the actuating means. to thecarriage shifting mechanism. The drive connection between gear sleeve346 and its associated collar 343 determines shifting of the carriage tothe right.

A similar mechanism is employed in connection with shift key 312 toenable the drive connection to determine shifting of the carriage to theleft. Pin 318 (Fig. 8) is engaged with the upper end of arm 396 (Figs. 4and 8) having its hub secured on shaft 386. At its left end, shaft 386(Fig. 4) has depending arm 39'! secured thereon in operative relationwith shift rod 398 having shift fork 399 at its rear end in engagementwith an annular groove in left-hand shift collar 343, It is seen,therefore, that depression of key 312 results in rocking of shaft 386and rearward movement of rod 398 to engage lefthand shift collar 343with gear sleeve 341. This conditions the carriage shift mechanism forshifting of the carriage to the left. It is to be noted that only asmall'amount of movement is required to engage teeth 343 with thecorresponding slots in gear sleeves 346, 341 so that the driveconnection is enabled during the first part of the downward movement ofkeys 31!, 312.

The latter part of the downward movement of keys 31!, 312 is utilized toengage the clutch and energize the motor. Studs 311, 318 (Fig. '7)overlie respective cam surfaces 48!, 482 at'the upper end of lever 483.Lever 483 is adjustably secured on lever 2|5 by pivot 2!6 and by pin andslot connection 484 having suitable clamping means for maintaining therelative adjustment between levers 2!5 and 483. From the relationofstuds 311, 318 and cam surfaces 48!. 482, it is evident that depressionof either of keys 31!, 312 is effective during the latter part of themovement to rock levers 483 and H5 in a clockwisedirection. It will berecalled that lever 2!5 is connected at its upper end by pin 2!4 withclutch actuating slide 288 (Fig. 6) so that movement of slide 288 willresult upon depression of either of the shift keys. Such movement iseffective in the manner previously described to engage the clutch. Itwill be recalled that the motor in energized upon oscillation of levers2!5, 2!1, Lever 483 (Fig. '7) also provides an interlock betweenshiftkeys 31!, 312 by means of lock portions 486, 481 which are adapted tocooperate with studs 311, 318, respectively. For example, if key 31! isdepressed, lock portion 481 moves into blocking position beneath stud318.

Means are provided for maintaining the drive connection from theactuating means to the carriage shifting mechanism throughout each cycleof movement even though the depressed shift key be released immediatelyafter depression thereof and before complete shifting of the carriage.

For this purpose each shiftable collar 343 is provided with a similarmechanism, only one of which will be described. Right-hand shiftablecollar 343 (Figs. 4, 5 and '1) is provided with disc 4!! having acut-a-way portion 4!2 which, in the full cycle position of collar 343,is in the position illustrated in Fig. 5. Immediately to the rear ofdisc 4! (Fig. '1), locking element M3 is provided mounted in bracket M4for movement radially of collar 343, and urged to its extended positionby spring 4I6. With shiftable collar 343 in its inactive position disc4!! is positioned forwardly of locking element H3 and when moved to itsactive position passes by element 4!3 which is in alignment with theeut-a-way portion 4!2'. Upon subsequent rotation of disc 4!! the solidportion thereof engages element M3 and prevents movement of collar 343forwardly of the machine so that teeth 342 are maintained in engagementwith gear sleeve 341 irrespective of release of the associated shiftkey. Left hand shiftable collar 343 is held in drive establishingposition for each cycle of rotation by similar mechanism.

From the foregoing description it is seen that keys 31!, 312 and theassociated mechanism provide means for shifting the carriage selectivelyin either direction from one ordinal position of the carriage toanother. Obviously, if a shift key be maintained in depressed position,shifting will continue until the carriage reaches an end position, when,as previously described, continued operation of the shifting mechanismin the same direction becomes ineffective. In a division operation, thecarriage shifting mechanism may be controlled by any suitable means, forexample in the manner described in said co-pendlng application, to shiftthe carriage to the right after each ordinal division is completed.

Shift-registration interlock Locking means are provided between shiftkeys 3', 312 and plus and minus keys 200, 20l to prevent depression ofeither of keys 3', 312 when a key 200, 2ll| is depressed, and viceversa. For this purpose, plus-minus slide 234 (Fig. 6) has upwardlyextending plate 4I6 mounted thereon having transverse notches M1, M8.When keys 200, 20! are in raised position, notches 4H, 8 are alignedverticallywith laterally projecting vertical ears M9, 420 (Fig. l) onkeys 3', 312.

. Upon depression of key 3H,. for example, ear 4l9 Accumulator andcounter disabling mechanism In a machine of the type disclosed havingpower driven shifting mechanism which can be controlled by keys todetermine a carriage shift in either direction, and which isautomatically controlled in divisionto shift the carriage after anoverdraft and the additive correction thereof, and particularly when theshifting mechanism is driven by operation of the actuating means, it isdesirable that precautions be taken to prevent any possibility oferroneous registration during a carriage shift. One essential feature isthe positive positioning of the plus-minus gears in neutral positionduring the entire carriage shift so that no possible contact can occurbetween such gears and the numeral wheels gears through vibration of theparts after the rapid movement of the plus-minus gears to and fromactive po :rition. Consequently, I have provided latch means positionedat the point of greatest movertnent of the plus-minus gears and which isoperated by the carriage shifting mechanism to latch the plus-minusgears positively in neutral or inactive position. For this purpose,latch sli 42! (Figs. 1 3 and 4') is mounted on strap 8| adjacent theright-hand end thereof by means of eccentricportion 422 (Fig. 3) ofadjusting screw 423. Screw 423 is clamped in bracket 424 on strap 8| bynut 426. By turning screw 423 eccentric portion 422 thereof efiectslongitudinal movement of slide 42! to position slot 421 in accuratevertical alignment with nose 428 (Figs. 1, 4 and of latch arm 429. Latcharm 429 is formed as an extension \of centralizing arm 3l1 so that, uponrotation of shift gear 312, nose 428 is moved from-the position showninto engagement with slot 421. By this means plusminus gears 12, 13 arepositively maintained in idle position during-a carriage shift.

Another possible source of erroneous registration during .a carriageshift lies in unintentional engagement of the continuously operatedrevolutions counter actuator with one of the numeral wheel gears of therevolutions counter. Such erroneous registration would occur when thecarriage is moving oppositely to the direction of movement of theactuator in the active portion of the cycle. To obviate this condition,I have provided means for disabling the revolutions counter actuatorwhen a machine operation is occurringother than an actuation ofaccumulator numeral wheels 2|. For this purpose, member or slides 43|(Figs. 1, 3 and 4) is pivoted on screw 423 and extends forwardlytherefrom and has its forward'end slidablysupported in cross framemember H. Member 43l (Fig. 1) is provided with vertical extension 432which, with gears I2, 13 in their neutral position, is positionedbeneath lateral projection 433 on spool III of the revolutions counteractuator. Because of the resilient actuation of the revolutions counteractuator in a clockwise direction, extension 432 prevents the rotaryoscillation thereof which is ordinarily effectiveto move the actuatorinto operative position. It is to be noted that latch slide 42l and arm429 also serve to latch member 43l in position to disable therevolutions counter actuator during shifting of the carriage. Thus, anerroneous registrationcannot occur in the revolutions counter duringcarriage shifting or any other machine operation not involving operationof the plus-minus gears I2, 13. Also, the revolutions counter actuatoris maintained in disabled condition whenever plus-minus slide 234 is ininactive position and is enabled by movement of slide 234 resulting frommanipulation of an operation control member such as keys 28-0, 20!, orautomatically during a division operation.

From the foregoing description, it is seen that I have provided animproved machine in which a simple and eflicient carriage shiftmechanism is provided. In connection with the carriage shiftingmechanism, I have also provided safety devices which prevent possiblejamming of the machine or possible erroneous registration be cause ofthe operation of the shifting mechanism from the accumulator actuatingmeans.

I, therefore, claim as my invention:

1. In a calculating machine having a frame, a register shiftable withrespect to said frame, an actuator for said register mounted in saidframe, cyclically operable driving means having constant operativeconnection with said actuator, means for shifting said register bycyclic operation of said driving means, means for rendering saidactuator ineffective during shifting of said register, and meanscontrolled by said shifting means for latching said last-named meansinactive position.

2. In a calculating machine having a shiftable accumulator, actuatingmeans therefor, shifting means driven by an element of said actuatingmeans for effecting relative shifting movement between .said accumulatorand said actuating means therefor, a revolutions counter, and anactuator for said counter having a'constant drive connection with saidactuating means; means for controlling a plural order operation of saidshifting means, comprising means for determining operation of saidshifting means with said actuating means in motion but ineffective toenter values in said accumulator, and means for rendering said counteractuator ineffective with respect to said counter during operation ofsaid shifting means.

3. In a calculating machine having a shiftable accumulator, actuatingmeans associated with said accumulator for selective operativeconnection thereto, means for shifting said accumulator relative to saidactuating means, a revolutions counter, an actuator associated with saidcounter for selective operative connection thereto, and common drivemeans for said accumulator actuating means and saidcounter actuator,said drive means being connected thereto to provide invariablesimultaneous operation of said accumulator actuating means and saidcounter actuator; means for controlling a plural order operation of saidshifting means, comprising means for operating said shifting means bysaid drive means, whereby both said accumulator actuating means and saidcounter actuator are driven during operation of said shifting means, andmeans associated with said shifting means for rendering said accumulatoractuating means and said counter actuator ineffective during operationof said shifting means without interrupting the drive therefor,

4. In a calculating machine, an accumulator comprising a series ofnumeral wheels, a gear carried by each numeral wheel; a pair of gearsassociated with each said numeral wheel gear and movable from aninactive position to mesh either gear of said pair with the associatednumeral Wheel gear; a bail associated with said pairs of gears forcontrolling simultaneously the adjustment thereof to and from theiractive and inactive positions, means associated with said pairs of gearsfor transmitting selected increments of movement thereto; a revolutionscounter, an actuator associated with said counter for selectiveoperative connection thereto, cyclically operable common drive means forsaid increment transmitting means and said actuator to provide forinvariable simultaneous operation thereof whenever said drive meansoperates; means for simultaneously effecting ordinal shifting movementbetween said accumulator and said pairs of gears and between saidcounter and said actuator, said shifting means being driven by saidcommon drive means; and means associated with said shifting means forrendering said pairs of gears and said actuator ineffective duringoperation of said shifting means.

5. In a calculating machine, an accumulator comprising a series ofnumeral wheels, a gear carried by each numeral wheel; a pair of gearsassociated with each said numeral wheel gear and movable from aninactive position to mesh either gear of said pair with the associatednumeral wheel gear; a bail associated with said pairs of gears forcontrolling simultaneously the adjustment thereof to and from theiractive and inactive positions, means associated with said pairs of gearsfor transmitting selected increments of movement thereto; a revolutionscounter, an actuator associated with said counter for selectiveoperative connection thereto; resilient means for urging said actuatorto active position with respect to said counter, cyclically operablecommon drive means for said increment transmitting means and saidactuator to provide for invariable simultaneous operation thereof; meansfor positioning said bail to adjust said pairs of gears to inactiveposition, and blocking means associated with said bail and positionedthereby with said gears in inactive position to prevent movement of saidactuator to active position under the urgency of said resilient means.

6. In a calculating machine, an accumulator comprising a series ofnumeral wheels, a gear carried by each numeral wheel; a pair of gearsassociated with each said numeral wheel gear and movable from aninactive position to mesh either gear of said pair with the associatednumeral wheel gears; a bail associated with said pairs of gears forcontrolling simultaneously the adjustment thereof to and from theiractive and inactive positions, means associated with said pairs of gearsfor transmitting selected increments of movement thereto; a revolutionscounter, an actuator associated with said counter for selectiveoperative connection thereto, cyclically operable common drive means forsaid increment transmitting means and said actuator to provide forinvariable simultaneous operation thereof whenever said drive meansoperates; means for performing a non-value-entering machine operationwith said pairs of gears inactive and with said common drive meansactive, and means associated with said operation performing means forrendering said actuator ineffective during said machine operation.

7. In a calculating machine, an accumulator comprising a, series ofnumeral wheels; a gear carried by each numeral wheel; a pair of gearsassociated with each said numeral wheel gear and movable from aninactive position to mesh either gear of said pair with the associatednumeral wheel gear; a bail associated with said pairs of gears forcontrolling simultaneously the adjustment thereof to and from theiractive and inactive positions, means associated with said pairs of gearsfor transmitting selected increments of movement thereto; a, revolutionscounter, an actuator associated with said counter for selectiveoperative connection thereto, resilient means for urging said actuatorto active position with respect to said counter, cyclically operablecommon drive means for said increment transmitting means and saidactuator to provide for invariable simultaneous operation thereof; meansfor performing a non-value-entering machine operation With said pairs ofgears inactive and with said common drive means active, and blockingmeans associated with said bail and positioned thereby with said gearsin inactive position to prevent movement of said actuator to activeposition under the urgency of said resilient means.

8. In a calculating machine, a shiftable carriage, a register in saidcarriage, cyclically operable actuating means for said register, asource of power, a cyclic clutch between said actuating means and saidsource of power and providing the only path of power flow therefrom,driven means having a normally disabled drive connection with saidactuating means, anelement on said carriage for receiving a drive fromsaid driven means, and means including a manually operable key forenabling said connection and engaging said clutch to transmit a drive tosaid part by driving of said actuating means but with said actuatingmeans ineffective with respect to said register.

9. In a calculating machine, a shiftable carriage, a register in saidcarriage, cyclically operable actuating means for said registerincluding a shaft, means including a clutch for driving said shaft,driven means, an element on said carriage for receiving a drive fromsaid driven means, normally disabled drive means between said shaft andsaid driven means, and means including a manually operable key forengaging said clutch and enabling said drive means to transmit a driveto said part by driving of said actuating means but with said actuatingmeans ineffective with respect to said register,

10. In a calculating machine, a shiftable carriage, a register in saidcarriage, cyclically operable actuating means for said-registerincluding a pair of parallel shafts connected for simultaneous movementsaid actuating means being normally ineffective to enter values in saidregister, means including a clutch for driving said shafts, a rack onsaid carriage, a reversible shift gear cooperatively related to saidrack, normally disabled drive means between each of said shafts and saidgear, one of said drive means operating to rotate said gear in onedirection and the other serving to rotate said gear in the otherdirection, and means including a plurality of manually operable shiftkeys for engaging said clutch and means movable from a neutral positionfor controlling positive and negative registration on said accumulatorby said actuating means, a revolutions counter, an actuator for saidcounterincluding a counting element and a series of transfer elementscooperatively related thereto for simultaneous movement therewith, aconstantly operative drive connection from said actuating means to saidactuator, and means controlled by said shiftable means and active in.said neutral position to disable said counting and transfer elements.

12. In a calculating machine having an accumulator and actuating meanstherefor, shiftable means movable from a neutral position forcontrolling positive and negative registration on said accumulator bysaid actuating means, a revolutions counter, an actuator for saidcounter having a drive connection with said actuating means forsimultaneous operation therewith, yieldable means for operating saidactuator, and means controlled by said shiftable means and active insaid neutral position to prevent registering operation of said actuatorby causing yielding of said yieldable means.

13. In a calculating machine having a shift-- able carriage, a registerin said carriage, actuating means for said register, said actuator meansbeing normally ineffective to enter values in said register, means forperforming a machine opera tion including an element on said carriagefor receiving a drive, and a source of power; the combination with acyclically operable clutch providing the sole path of power flow fromsaid source of power, of a'plurality of manually oper-able control keysfor controlling cyclic operation of said clutch, means controlled bycertain of said keys for causing registration on said register byoperation of said actuating means, and means controlled by others ofsaid keys for causmulatol, actuating means therefor, and means includinga cyclic clutch for driving said actuating means, shiftable means foreffecting positive and negative registration on said accumulator by saidactuating means, a revolutions counter, an actuator for said counterhaving a constantly operative drive connection with said clutch toreceive an invariable cyclic movement therefrom, and means controlled bysaid shiftable means for rendering said actuator ineffectiveirrespective of continued movement thereof during operative drivingmovement of said clutch. I

16. In a calculating machine, a shiftable carriage, a register in saidcarriage, cyclically operable actuatingmeans for said register, a sourceof power, a cyclic clutch between said actuating means and said sourceof power and providing the only path of power flow therefrom, carriageshift means for shifting said carriage in either direction, selectivelysettable means for driving said shift mechanism by said actuating means'with said actuating means ineffective to enter values in said register,and means including a pair of manually operable shift keys for engagingsaid clutch and for selectively setting said settable means.

1'7. In a calculating machine having numeral effecting means, and meanscontrolled by said ing operation of said machine operation performingmeans, said lastnamed controlled means including a normally disableddrive connection between said actuating means and said performing meansfor transmitting a drive to said element.

14. In a calculating machine having a shiftable carriage, a register insaid carriage, actuating means for said register, said actuating meansbeing normally ineffective to enter values in said register, shift meansfor said carriage having a drive connection with said actuating means,and

, a source of power; the combination with a cyclically operable clutchbetween said actuating means and said source of power providing the solepath of power flow therefrom, of means including a plurality of manuallyoperable control ment thereof, a pair of selectively operablemanipulable control members for engaging said clutch and for selectivelyengaging said drive connections to control the direction of movement ofsaid drive element, and means for maintaining said actuating meansineffective to enter values in said numeral wheels during said machineoperation.

. CARL M. F. FRIDEN.

